Creation Moment 4/30/2012 - "Refill" of Fill the earth?

And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth,

Genesis 1:28 KJV

So did God tell them to actually "replenish" the earth, as if at one point it had already been full-or did He mean to fill the earth?
"But as any Hebrew interlinear Bible or Bible dictionary will tell you, the word translated as ‘replenish’ in Genesis 1:28 is the Hebrew verb מלאו(mil’û), which simply means fill. Not refill. Which is why most modern versions translate the word in Genesis 1:28 as fill. But this does not necessarily mean that the King James translators made a mistake here. They seem to have known what the Hebrew word meant, as shown by the fact that in most other places it appears in the OT, they simply translated it as ‘fill’." AIG

Then God blessed them, and God said to them, "Be fruitful and multiply; fill the earth and subdue it; 

Genesis 1:28 NKJV

God blessed them and said to them, "Be fruitful and increase in number; fill the earth and subdue it.

Genesis 1:28 NIV

God blessed them:
"Prosper! Reproduce! Fill Earth! Take charge! Genesis 1:28 MSG

And God blessed them, and said, Increase ye, and be ye multiplied, and fill ye the earth, and make ye it subject;

Genesis 1:28 Wycliffe Bible